Specification Approval Sheet

Transcription

1 Specification Approval Sheet Name: Tenergy LiFePO4 Battery Model: SPECS: 3.2V 24Ah Approved By Checkup Make Signature Date Customer Confirmation Company Name: Stamp:, U.S.A.

2 1. Scope This specification describes the product performance of the Soft package LiFePO4 rechargeable batteries, which is manufactured by. 2.Model: Dimension:(70% SOC) Al Tab Ni Tab + - Item Description Dimensions T Thickness 11.5 mm max W Width 136 mm max L Length 250 mm max A Tab Length 20.0±1.5 mm B Tab width 30.0±0.5 mm C Distance between Tabs 61.0±1.5 mm Tab Thickness 0.2±0.02mm, 正极耳铝转镍 ( 镍带厚度 0.15±0.02mm), 负极耳铜镀镍 All rights reserved. Page 2 of 8

3 4. Specifications: NO Item Specification 1 Nominal capacity 24Ah 0.3C(7200mA)discharge 2 Typical capacity 25Ah 0.3C(7200mA)discharge 3 Min capacity 24.3Ah 0.3C(7200mA)discharge 4 Nominal voltage 3.2 V 5 Impedance 1.8mΩ Internal resistance measured at AC 1KHZ after 50% SOC 6 Charge cut-off voltage 3.65 V 7 Discharge cut-off voltage 2.0V 8 Standard charging Constant current at 0.3C with max. voltage of 3.65V and cutoff current at 0.02C 9 Standard discharging 10 Max.(rapid)continuous charge current 11 Max. discharge current 12 Charging time Constant current at 0.3C with min. voltage of 2.0V 2.0C 3.0C Standard charge:5.0h(reference) Rapid charge:2.5h(reference) 13 Operating temperature Charge:0 C ~ 45 C Discharge:-20 C ~ 60 C Storage temperature Storage humidity Less than 3 months:-10 C ~ 45 C Less than 1 year:-10 C ~ 25 C 60±25%RH 16 Separator 40um 17 Laminated film 152um 18 Cell Weight Approx:720 g All rights reserved. Page 3 of 8

4 5. FEATURE CURVE Discharge Curve Of Different Rate Discharge Curve Of Different Temperature Charge Curve Of Different Rate Life Cycle curve 6. Battery Performance 6.1 Electrical characteristics NO. Item Requirements Test Method 1 Rate Discharge Performance Discharge Capacity/Nominal capacity 100% 0.3C 100% 1.5C 95% a).standard charge at 0.3C under the condition of normal atmospheric pressure, the environmental temperature 25±2 and the relative humidity 45%~80%, then discharge at 0.3C/1.5C to 2.0V or other cut-off voltage which is specified b)the capacity(ah)=the discharge time(hour)*discharge current(a), and is described as the percentage of the actual capacity and the nominal capacity (Charge/discharge cycle can be repeated for 3 times before meeting the Standards,the same below) All rights reserved. Page 4 of 8

5 2 High-low Temperature Discharge performance Discharge Capacity/Nominal capacity 100% A) 55 时 95%; B)-20 时 50%; After Standard charging, store it at the constant temperature of 55±2 for 5h(-20±2 for 20h), then discharge at 0.3C to 2.0V or other cut-off voltage which is specified in the technical document of the company, the capacity(ah)=the discharge time ( hour ) *discharge current(a), and is described as the percentage of the actual capacity and the nominal capacity 3 Storage performance recoverable capacity Min capacity *95% Standard charge and then rest for 1h,then discharge for 2h at 0.3C;storge for 90 days at 25 ±2 ;After standard charge, discharge at 0.3C, Charge/discharge cycle can be repeated for 5 times before meeting the Standards 4 Cycle Life Discharge Capacity Nominal capacity*80% 0.3C/0.3C cycle for 2000 times.the discharge capacity shall be measured after 2000 cycles. 6.2 Safety Performance NO. Item Requirements Test Method 1 Over charge No fire,no explosion After standard charging,charge at 3C to 10V 2 Over discharge No fire,no explosion After standard charging,discharge at 0.3C to 0V at 25±2 3 Short Circuit at Room Temperature No fire,no explosion After standard charging, Put the battery into a ventilation explosion-proof cabinet and short-circuit the positive and negative terminals directly (general resistance shall be less than or equal to 5mΩ) for 10 minutes. 4 Drop No fire, no explosion., No leakage After standard charging, let itself fall off from a height of 1.5m (the lowest height) to a rigid wooden board with a thickness of 20mm. The drop is implemented one time for every face All rights reserved. Page 5 of 8

6 5 Thermal Shock No fire, no explosion After standard charging,keep the battery in the oven with a constant temperature of 85 ±2 for 2 hours. 6 Crush No fire, no explosion 7 Impact No fire, no explosion After standard charging, put the battery on the bracket,1. Extrusion direction: Perpendicular with the direction of the battery plates. 2. Extrusion contact area : 20cm Extrusion degree: Until the battery shell ruptured or internal short circuit (battery voltage becomes 0V) After standard charging,placed the battery on a flat surface. A 15.8 mm diameter bar is to be placed across the center of the battery. A 9.1kg weight is to be dropped from a height of 610mm onto the battery. After standard charging, put the battery on the bracket,penetrate through it with a 3mm ~ 8mm diameter nail near the center of its biggest surface at the speed of 10mm/s-40mm/s. 8 Needle puncture performance No fire,no explosion Comments:The definitions of some nomenclatures of this specification. 1) Standard charge:charge with current 0.3C to limit charge voltage 3.65V under the condition of 25 ±2, then charge with constant voltage of 3.65V till the current less than or equal to 0.02C. 2) Residual Capacity: The first discharge capacity after being tested by specific procedure. 3) Standard Cycle:After standard charge at 0.3C, rest for 10min, then discharge at 0.3C to 2.0V. 4) Recovery Capacity: The discharge capacity by implementing charge-discharge cycle repeatedly after being tested by the specific procedure. 5) Test should be conducted with new batteries within one month after shipment from our factory, Unless otherwise specified. 7. Visual Inspection There shall be no such defects as scratch, flaw, crack, and leakage, which may adversely affect battery performance. 8. Standard test environment Unless otherwise specified, all tests defined in this Product Specification are conducted at below condition: Temperature: 25±2 Humidity: % RH Atmosphere pressure : 86KPa~106 kpa 9. Storage and Others All rights reserved. Page 6 of 8

7 9.1 Long Time Storage If the cell is stored for a long time,the cell should be stored in drying and cooling place. The cell should be charged and discharged every 3 months The cell s storage voltage should 3. 0V and the cell is to be stored in a condition as NO Others Any matters that this specification does not cover should be consulted between the customer and TENERGY. 10. Notice of Handling of Cells Since the battery is packed in flexible package, to ensure cells against damage, you should carefully handle the battery Soft aluminum foil packing The soft aluminum foil packing is very easily damaged by sharp edge parts such as Ni-tabs and needles. Don t strike battery with any sharp edge parts Clean work environment to make sure no any sharp component 10.2 Top sealed edge Sealing edge is very easy to be damaged Don t bend or fold sealing edge 10.3 Folding edge The folding edge is formed in battery production process and passed all hermetic test Don t open and deform folding edge 10.4 Tabs The battery tabs are not so firm especially the aluminum tab Don t bend tab 10.5 Mechanical shock Don t drop, hit, bend battery body 10.6 Short circuit Short circuit of battery is strictly prohibited at any time, it may damage battery very badly Notice of Designing Battery Pack The outer shell of the Battery should have sufficient strength and cell should be protected from mechanical shock. No Sharp edge components should be inside of the outer shell Cell connection Ultrasonic welding or spot welding is recommended to connect battery with PCM or other parts If apply manual solder method to connect tab with PCM, below notice is very important to ensure battery performance a. The temperature of the solder iron should be controlled and static-proof b. The Soldering temperature should not exceed 370 C c. Soldering time should not be longer than 3s d. Soldering times should not exceed 5 times e. Keep the battery tab cold down before the next time soldering f. Directly heat cell body is strictly prohibited, Battery may be damaged by heat above approx 80 C All rights reserved. Page 7 of 8

8 11. Warnings and Cautions in using the battery To prevent the possibility of the battery from leaking, fever, please observe the following precautions: WARNINGS! Use the battery charger specifically for that battery when recharging. Do not discard the battery in fire or a heat. Do not dismantle the battery Do not immerse the battery in water or seawater, and keep the battery in a cool dry surrounding if it stands by. Do not use or leave the battery near a heat source such as fire or heater. Please choose LiFePO4 battery charger when charging. Do not reverse the positive and negative terminals. Do not connect the battery to an electrical outlet. Do not short-circuit the battery by directly connecting the positive and negative terminals with metal objects. Do not transport or store the battery together with metal objects such as hairpins, necklaces, etc. Do not strike, trample or throw the battery. Do not directly solder the battery and pierce the battery with a nail or other sharp objects. CAUTIONS! Do not use or leave the battery at high temperature (for example, in strong direct sunlight or in a vehicle in extremely hot weather). Otherwise, it can be overheated or its performance will be degenerate and its service life will be decreased. Do not use the battery in a location where static electricity and magnetic field is great, otherwise, the safety devices may be damaged, causing hidden trouble of safety. If the battery leaks, and the electrolyte get into the eyes, do not rub the eyes, instead, rinse the eyes with clean water, and immediately seek medical attention. Otherwise, it may injure eyes. If the battery gives off an odor, generates heat, becomes discolored or deformed, or in any way appear abnormal during use, recharging or storage, immediately remove it from the device or battery charger and stop using it. In case of the battery terminals are dirty, clean the terminals with a dry cloth before use. Otherwise performance may degenerate due to the poor connection with the instrument. Be aware that discarded batteries may cause short circuit or leak, tape the battery terminals to insulate them All rights reserved. Page 8 of 8